<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>标签选择器</title>
<style>
    div{
        background-color: yellow;
        color: red;
    }
    h1{
        color: blue;
    }
</style>
</head>
<body>
    <div>11111111111</div>
    <div>44444444444</div>
    <h1>222222222222</h1>
    <p>3333333333333</p>
</body>
</html>